<template>
  <div>
      <el-breadcrumb separator="/">
        <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
        <el-breadcrumb-item>商品管理</el-breadcrumb-item>
        <el-breadcrumb-item>参数列表</el-breadcrumb-item>
    </el-breadcrumb>

      <el-card>
        <el-alert title="注意,只允许第三季分类设置相关参数" type="warning" :closable='false' show-icon ></el-alert>
         <!-- 选择商品分类区域 -->
         <el-row class="cat_opt">
           <el-col>
             <span>选择商品分类: </span>
               <el-cascader
                expand-trigger="hover"
                :options="cateList"
                :props="cateProps"
                v-model="selectedCatKeys"
                @change="handleChange">
            </el-cascader>
           </el-col>
         </el-row>

         <el-tabs v-model="activeName" @tab-click="handleClick">
    <el-tab-pane label="动态参数" name="many">
      <el-button type="primary" size="mini" :disabled="isBtnDisable" @click="addDialogVisible=true">添加参数</el-button>
      <!-- 动态参数表格 -->
      <el-table :data="manyTableData" border stripe >
      <el-table-column type="expand" >
          <template slot-scope="scope">
             <el-tag v-for="(item, index) in scope.row.attr_vals" :key="index" closable @close="handleClose(i,scope.row)">{{item}}</el-tag>
              <!-- 输入文本框 -->
             <el-input
                class="input-new-tag"
                v-if="scope.row.inputVisible"
                v-model="scope.row.inputValue"
                ref="saveTagInput"
                size="small"
                @keyup.enter.native="handleInputConfirm(scope.row)"
                @blur="handleInputConfirm(scope.row)"
              >
             </el-input>
             <el-button v-else class="button-new-tag" size="small" @click="showInput(scope.row)">+ New Tag</el-button>
          </template>
      </el-table-column>
       <el-table-column type="index" ></el-table-column>
       <el-table-column label="参数名称" prop="attr_name" ></el-table-column>
       <el-table-column label="操作">
        <template slot-scope="scope">
           <!--修改按钮-->
            <el-button type="primary" icon="el-icon-edit" size="mini" @click="showEditDialog(scope.row.attr_id)"></el-button>
                 <!--删除按钮-->
            <el-button type="danger" icon="el-icon-delete" size="mini" @click="removeParams(scope.row.attr_id)"></el-button>
        </template>
       </el-table-column>
      </el-table>
    </el-tab-pane>
    <el-tab-pane label="静态属性" name="only">
      <el-button type="primary" size="mini" :disabled="isBtnDisable" @click="addDialogVisible=true">添加参数</el-button>
        <!-- 动态参数表格 -->
      <el-table :data="onlyTableData" border stripe >
      <el-table-column type="expand" >
          <template slot-scope="scope">
             <el-tag v-for="(item, index) in scope.row.attr_vals" :key="index" closable @close="handleClose(i,scope.row)">{{item}}</el-tag>
              <!-- 输入文本框 -->
             <el-input
                class="input-new-tag"
                v-if="scope.row.inputVisible"
                v-model="scope.row.inputValue"
                ref="saveTagInput"
                size="small"
                @keyup.enter.native="handleInputConfirm(scope.row)"
                @blur="handleInputConfirm(scope.row)"
              >
             </el-input>
             <el-button v-else class="button-new-tag" size="small" @click="showInput(scope.row)">+ New Tag</el-button>
          </template>
      </el-table-column>
       <el-table-column type="index" ></el-table-column>
       <el-table-column label="属性名称" prop="attr_name" ></el-table-column>
       <el-table-column label="操作">
        <template slot-scope="scope">
           <!--修改按钮-->
            <el-button type="primary" icon="el-icon-edit" size="mini" @click="showEditDialog(scope.row.attr_id)"></el-button>
                 <!--删除按钮-->
            <el-button type="danger" icon="el-icon-delete" size="mini" @click="removeParams(scope.row.attr_id)"></el-button>
        </template>
       </el-table-column>
      </el-table>
    </el-tab-pane>
    
  </el-tabs>
      </el-card>
 <!--添加参数对话框-->
      <el-dialog
        :title="'添加'+titleText"
        :visible.sync="addDialogVisible"
        width="50%"
        @close="addDialogClosed"
      >
        <el-form :model="addForm" :rules="addFormRules" ref="addFormRef" label-width="100px">
            <el-form-item :label="titleText" prop="attr_name">
              <el-input v-model="addForm.attr_name"></el-input>
            </el-form-item>
        </el-form>  
        <span slot="footer" class="dialog-footer">
          <el-button @click="addDialogVisible = false">取 消</el-button>
          <el-button type="primary" @click="addParams">确 定</el-button>
        </span>
      </el-dialog>
    <!--修改参数对话框-->
       <el-dialog
        :title="'修改'+titleText"
        :visible.sync="EditDialogVisible"
        width="50%"
        @close="EditDialogClosed"
      >
        <el-form :model="EditForm" :rules="EditFormRules" ref="EditFormRef" label-width="100px">
            <el-form-item :label="titleText" prop="attr_name">
              <el-input v-model="EditForm.attr_name"></el-input>
            </el-form-item>
        </el-form>  
        <span slot="footer" class="dialog-footer">
          <el-button @click="EditDialogVisible = false">取 消</el-button>
          <el-button type="primary" @click="EditParams">确 定</el-button>
        </span>
      </el-dialog>
  </div>
</template>

<script>
export default {
data() {
    return {
        cateList:[], //商品分类
        // 级联选择框的配置对象
        cateProps:{
            value:'cat_id',
            label:'cat_name',
            children:'children'
        },
        //级联选择框双向绑定的数据
        selectedCatKeys:[],
        activeName:'many',
        // 动态属性的验证
        manyTableData:[],
        // 静态属性的数据
        onlyTableData:[],
        addDialogVisible:false,
        // 添加参数的表单验证对象
        addForm:{
          attr_name:''
        },
        // 添加表单的验证规则对象
        addFormRules:{
          attr_name:[ {required:true,message:'请输入参数名',trigger:'blur'},]
        },
        // 控制修改对话框的现实隐藏
        EditDialogVisible:false,
        // 修改的表单数据对象
        EditForm:{},
        // 修改表单的验证规则对象
        EditFormRules:{
           attr_name:[ {required:true,message:'请输入参数名',trigger:'blur'},]
        },
   
    }
},
computed:{
    isBtnDisable(){
        if(this.selectedCatKeys.length!=3){
            return true
        }
        return false
    },
    // 当前选中的三级id
    cateId(){
          if(this.selectedCatKeys.length===3){
            return this.selectedCatKeys[2]
          } 
          return null
    },
    // 动态计算标题的文本
    titleText(){
         if(this.activeName=='many'){
           return '动态参数'
         }
         return '静态属性'
    }
},
created(){
 this.getCateList()
},
methods: {
   async getCateList(){
         const { data: res } = await this.$http.get('categories')
      if (res.meta.status !== 200) {
        return this.$message.error('获取商品分类失败！')
      }
      this.cateList=res.data
      // console.log(this.cateList);
    },
    // 选中款发生变化出发
  handleChange(){
    this.getParamsData()
    },
    handleClick(){    
        this.getParamsData()
        console.log(this.activeName);
    },
    // 获取参数列表数据
  async  getParamsData(){
       // 不是三级分类
       if(this.selectedCatKeys.length!==3){
           this.selectedCatKeys=[]
           return
       }
       console.log(this.selectedCatKeys);

      //  根据分类和id 和当前所处的面板 获取对应的参数
       const {data:res}=await this.$http.get(`categories/${this.cateId}/attributes`,{params:{sel:this.activeName}})
       if (res.meta.status !== 200) {
        return this.$message.error('获取参数列表失败！')
      }

        res.data.forEach(item=>{
          item.attr_vals=item.attr_vals ? item.attr_vals.split(' '): [] 
          // 控制文本框的显示和隐藏
          item.inputVisible=false
          item.inputValue=''
        })
                // console.log(res.data);
        if(this.activeName==='many'){
          this.manyTableData=res.data
        }else{
          this.onlyTableData=res.data
        }
    },
    // 添加对话框的关闭事件
    addDialogClosed(){
          this.$refs.addFormRef.resetFields()
    },
    // 点击按钮  添加参数
    addParams(){
       this.$refs.addFormRef.validate(async valid=>{
          if(!valid) return
       const {data:res} = await this.$http.post(`categories/${this.cateId}/attributes`,{
            attr_name:this.addForm.attr_name,
            attr_sel:this.activeName
          })
            if (res.meta.status !== 201) {
        return this.$message.error('添加参数失败！')
       }
        this.$message.success('添加参数成功')
        this.addDialogVisible=false
        this.getParamsData()
       })
    },
    // 修改对话框
  async  showEditDialog(attr_id){
   const {data:res}= await  this.$http.get(`categories/ ${this.cateId} /attributes/${attr_id}`, {params:{attr_sel:this.activeName}} )
           if (res.meta.status !== 200) {
               return this.$message.error('获取参数失败！')
           }
           this.EditForm=res.data
           this.EditDialogVisible=true
    },
    // 重置修改的表单
    EditDialogClosed(){
      this.$refs.EditFormRef.resetFields()
    },
    // 点击按钮 修改参数信息
    EditParams(){
      this.$refs.EditFormRef.validate(async valid=>{
        if(!valid) return
      const {data:res} =await this.$http.put(`categories/${this.cateId}/attributes/${this.EditForm.attr_id}`,{
           attr_name:this.EditForm.attr_name,
           attr_sel:this.activeName
        })
         if (res.meta.status !== 200) {
               return this.$message.error('修改参数失败！')
           }
           this.$message.success('修改参数成功！')
           this.getParamsData()
             this.EditDialogVisible=false
      })
    },
  async removeParams(attr_id){
     const confirmResult=await this.$confirm('此操作将永久删除该参数, 是否继续?', '提示', {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning'
        }).catch(err=>err)
        if(confirmResult!=='confirm'){
          return this.$message.info('取消删除！')
        }

        // 删除的业务逻辑
      const {data:res} = await this.$http.delete(`categories/${this.cateId}/attributes/${attr_id}`)
       if (res.meta.status !== 200) {
               return this.$message.error('删除参数失败！')
           }
      this.$message.success('删除参数成功！')
      this.getParamsData()
    },
    // 文本框失去焦点 出发
    async   handleInputConfirm(row){
          if(row.inputValue.trim().length=== 0){
             row.inputValue=''
             row.inputVisible=false
             return
          }
          // 如果没有return 则输入的内容需要做后续处理
          row.attr_vals.push(row.inputValue.trim())
          row.inputValue=''
          row.inputVisible=false
         this.saveAttrVals(row)
        },
        // attrvals操作保存到数据里
     async   saveAttrVals(row){
              // 发请求，保存这次操作
        const {data:res} =await this.$http.put(`categories/${this.cateId}/attributes/${row.attr_id}`,{
            attr_name:row.attr_name,
            attr_sel:row.attr_sel,
            attr_vals:row.attr_vals.join(' ')
          })
         if (res.meta.status !== 200) {
               return this.$message.error('修改参数失败！')
           }
           this.$message.success('修改参数成功')
        },
        // 点击按钮 展示文本输入框
        showInput(row){
          row.inputVisible=true
            this.$nextTick(_ => {
          this.$refs.saveTagInput.$refs.input.focus();
        });
        },
        // 删除对应的删除可选性
        handleClose(i,row){
          row.attr_vals.splice(i,1)
          this.saveAttrVals(row)
       }
        
},

}
</script>

<style lang="less" scoped>
.cat_opt{
    margin: 15px 0;
}
.el-tag{
margin: 10px;
}
.input-new-tag{
  width: 150px;
}
</style>